The article focuses on the use of the Paleo-Hebrew script versus the square script (known also as “Jewish script†or “Assyrianâ€) by the Jews of Judea during the Hellenistic and Roman periods. From the Persian period until the Bar Kokhba Rebellion, Paleo-Hebrew script was used in various Jewish contexts (official, sacred, funerary) and on a variety of substrates (parchment, stone, coins, and pottery). The most representative artefacts bearing inscriptions in the Paleo-Hebrew script are Jewish coins of that time and the Dead Sea Scrolls. One common view is that because the Hasmoneans and the rebels in both revolts sought to establish their sovereignty, they employed symbols of Jewish significance and the archaic and obsolete – but prestigious – Paleo-Hebrew script, which was a reminder of the glorious past. Studies of the Dead Sea Scrolls commonly premise that greater holiness and value was attached to the Paleo-Hebrew script than to the square script. The article shows that, in the Second Temple period, the square script was considered holy. Consequently, those who were scrupulous about observing the laws of ritual purity refrained from using the square script for mundane purposes and used the Paleo-Hebrew script instead.